After this point, I really feel your mileage may vary. With BUD, you had a goal, goddammit, of reaching the top of that blasted tree. With Bob, you've no real idea where you're going, other than that each increasingly sprawling level ends with your falling through the sky to the next one. For BUD it felt desperate, urgent. For Bob it feels trivial, if entertaining. And then that last part really does depend upon how patient you're feeling at any moment.